Minecraft Auto-Furnace
Do you always need to move your cooked ores or ingots to a chest after there smelted. Do you ever feel like this could be easier. Well now it can. This design will move the cooked items into a predetermined chest. This will work for most versions of Minecraft above 1.5.2 and does not require mods.
Materials
So you'll need 2x1x5 block space, 3 hoppers, 3 chests, 1 furnace, some fuel (coal) and something to smelt or cook (iron ore).
Design
First, place a chest at the bottom (i'll use a double chest). Second, Shift+Right Click hopper onto chest. You MUST hold down shift while place the hopper onto the chest and make sure you are aiming on top of the chest. Third, place a furnace on top of the hopper. Then, place a hopper on top and beside the furnace while repeated what I mentioned earlier. Lastly, place a chest on top of each empty hopper and your done.
Usage
Add fuel (coal) into side chest and item to be cooked or smelted (iron ore) and wait. That's about it. In a few seconds the bottom chest will start filling with the end product. If you have any issues please comment and I'll try to help.